Detailed Product Description 5-inch E-ink display panelDimensions: 148 x 102 ... frequency up to 400MHz2.5mm earphone port and 2.0 mini USB portSupports microSD/T-Flash card ... up to 16GBSupports FMBuilt-in 128MB NAND flash Supported file format: TXT, HTML, PDF, FB2, PDB, EPUB, RTF ... zoom in/out, dictionary Supported image format: JPG, BMP, PNG, and GIFSupported MP3 format: WMA, MP3, and WAVSupports TTS, ...